Electrically-heated cup or container.



. tionjfor Letters Patent, filed UNITED, s TATEs PATENT4 OFFICE.

WlLLIAM P. ROBERTSON, 0F NEW YORK, N. Y.

ELECTBICALL'Y-HEATD CUP 0B CONTAINER.

Specication of Letters Patent.

Patented June 18, 1918.

Application led September 15, 1516. Serial No. 120,310.

vide asimple and effective device of this4 class which will rapidly heatthe liquidplaced therein, and may be rapidly cleaned,

and in .which the several elements will be of simple design and welladapted to per- -form t e functions required of them.

A further object of the invention is to so position and support theelectrical heating element, that aILradiated heat thereof, will.'

be taken up by the food and beverage in the container whereby the rapidheating is provided with a sultable handle, (3) and a effected withoutloss `of heat.

A further object of the invention is toadapt the samefor effective usein a comfbined electrical food 'or beverage mixer.

applica- V une 15th, 1916, under Serial. #103,82-7, which resultedinlatentV Number 1 27,935, and to provide -means whereby t e liquid whenagitated ma be caused to circulate on both sides of t e heatin element.

A still further o ject of the invention .is to enable the heatingelement to-be readily attached or'replace l A A still further objectofthe invention is to enable the heating element to be used in,connection with porcelain, glass or other and 4heater suchas shown in mnon-metallic containers, and inwhich the walls will not be unduly heatedfrom the heating element." l

With these and other objects in -view thev invention comprises theimprovement and arrangementsof parts hereafter described .in detail inthe accompanying specification and drawings.

Referring to the drawings:

Figure #1 isa side elevation of the cup c'ut away to expose a part ofthe heating elements. Fig. .#2 is a plan View ofthe cup or containershowing ,the 'position of the heating element. Fig. #3 is a horizontalsection of the heating element detached The smaller lower from the cup,or container, taken on a line through the center of the two projectionscarrying the terminals of the heating wires or coil. Fig. #4'is ahorizontal section through one of the projections of the heatingelement, showin the mode of attachment, to the Side o the cup orcontainer and the insulation and attachment of the' terminal plug to oneof the terminals of the heating coil or element. Fig. #5 is a sectionalviewthrough the lines A and B'of Fig. #2.

Referring to' Fig. #I of the drawing:

The cup or container C is of an convenient size'or shape; as shownit isormed with an upper cylindrical ortion (1) and a lower. portion (2') o?smaller diameter.

ortion may be readily engagedby the resillientmetal holders enerallyemployed in electric food and eragemixers or a itators. The cup Gispouring lip (4;. Within the cup and spaced from the wal thereof 'istheheating element D provided with suitable current-connectors E -and VFwhich extend through thefwall of the container, preferably on thecylindrical and secured to the outsidel of the cup. Resting upon each(projection (5) and (5') are washers (6 an (6')v of insulating materialupon W ich rests the nut heads, (7)and (7') which are a art of theprojecting meta plug on pins 8) and (8') forming the electricalterminals as hereinafter explained. `The construction of heating element(9) is shown in the sectional view, Figs. 3 and 5 in which (fr) and (s)arerespectively an outer and inner airtightshell of metal incasedresistance wires or elements, (12) which are embedded iii porcelain (13)or4 other insulating material or means .for msulating the resistancewires. The terminals of the resistance wires are attachedres ectively totwo metal connect ors (14) an (15) which .pass outward from the heatingelement, the said connections being properly insulated from theirrespective casings (l0) and (11) by tlie respective. insulatinbushings', (16) and (17).A outer en s of (14) and (15) are tapped andthreaded to form sockets (18) and (19) loc' The y which are adapted toreceive the threaded projections on the removable terminal pins (8) and(8'). i

The cup is designed particularly to be used with the ordinary type ofelectric food and beverage mixer of which only-the stirrer or agitator'K is shown in the`dra`wings. This mixer for example would be of the typeshown in my aforesaid application Serial #103,827. To cause effectiveand rapid' heating of the lcirculating food or beverage .means areprovided to deflect the material in the cup to opposite sides of theheating element.

VIt will be noted in Figs. 2 and 3 that one end (y) of therasing iscarried inward, and the other end (az) is flared slightly outward toform deliecting wings whereby when the food or beverage within thecontainer is being rapidly agitated from left to right by agitator K ofthe mixer, the current thereby created and shown by the arrows will bedeflected by the end (y) thus creating a circulation on both sides ofthe heating element, resulting thus in a more rapid heating process.

Fig. 4 shows in detail the means employed' in attaching the outerterminal plugs to the terminal connectors of the heating element, andalso the means of holding this securely in position with respect to thesurrounding cup or container. The connections shown with respect to oneterminal in Fig. 4,' (both terminal connections being identical) are asfollows: In the sides of the cup C is bored a hole of a diameter tosecure and pass the outer end of the casing (11) up to the flange (21)which abuts' against the. inside of the cup C and this holds the heatingelement the proper distance away from the inside circumference of thecup C. The other metal projection (5) is also bored with the samediameter as the hole referred to, and is so placed and attached thatthere is thus a concentric circu'lar outlet through the cup or containerand the outer metal projections. The connecting plug (8) has a nutrlikehead (7) with a further threaded projectionV (20). The said threadedprojection passes through a tight hole in the insulating washer (6), andscrews into the topl (19) of the connector, (15) Fig. 3, thus formin aVtight. insulating connection between t e outer. terminal plug and theterminal connections of the heating element and at the same time holdingthe heating element securely in position through the flanges (21) and(22)t which tighten against the inner side ofthe cup or container.

It is clearly evident that, by unscrewing theterminal lugs, the entireheating element may be isengaged from the inside of the cup orcontainer, and another inserted if so desired. The terminal plugs (8)and nected from the source of current by a veryV simple movement.

It will also be noted that the heating element D lies in th'e enlargedupper portion of the cup, and has the same diameteras the lower portionwith its center in the same vertical line as the center ofthe lowerportion, whereby a. clear space is left for the mixing element in'thecenter of substan tially the diameter of the lower portion 2.'

-It is evident from the above descriptions that other details'ofconstruction may be resorted to by those skilled without departing fromthe spirit and scope of my invention and the appended claims.

What I claim isz` 1. An electric heating device comprising a container,a metal incased electric resistance element .therein tubular supportingVmembers extending through` the container but insulated therefrom andsupporting the resistance element in position out of contact withtheinner surface of the container, and connectors for the resistanceelements mounted in the tubular members but insulatedtherefrom. t

2. An electric heating container-comprising a cup, an electric heatinelement on the interior spaced from the wa and means on the jends-of theheatin element adapted to deflect liquidcirculate. in the cup toopposite sidesof the heating element. y,

. 3. In combination a container, a mixing element therein,a heatingelement in 'the container'and means to deflect the material circulatingin the container to opposite sides of the element.

A, 4. An electric heating device comprising a container, a metal incasedC'shaped elec trical heatin element therein s aced from thev inner wathereof sub'stantia ly parallel thereto, tubular members extendingthrough the wall of the container adapted to support the' heatingelement and being insulated from the wall ofthe container and conlis andresistance wire insulated therefrom, tubular members connected to thecasing and projecting through the terminal pins connected to theresistance wire, but insulated from the tubular mem bers. l

7. In combination a container, a heating element therein, incmding ahollow casing and resistance wire1 tubular members connected to thecasing und projecting through the wall of the container, terminal pinsconnected to the resistance wire, but insulated from theA tubularmembers, said pins being formed with outer removable portions.

8. An electrical heating device comprising a container having thenpper'section larger than the lower section, a metal in` casedelectric-heating element in the upper section, spaced from the wallsthereof of a diameter substantially the same as the .lower section andlocated concentrically thereabove, means vfor holding the heatingelement in a rigid position in relation to the walls of the containerand means insulated -from the walls of the container for carrying theterminals of the heating elements to 'the exterior thereof.

9. An electrica-l heating device comprising a container having the uppersection larger than the lower section, a metal incascd electric heatingelement in the upper wall of the container,

section spaced from the walls thereof of a diameter substantially thesame as the `lower section and located concentrically thereabove, meansfor holding the'heating element in a rigid position in relation to thewalls of the container, and means insulated away 4from the walls' of'adiameter substantially the s ame as the lower section and locatedconcentrically thereabove, means for supporting the heatlng element inposi-tion and supplyin -the same with current,and means on the eatinelement adapted t d eect the liquids being heated to opposite sides ofthe elements. i In witness whereof I have hereunto si ed my name in thepresence of two subscri ing witnesses.

WILLIAM P. ROBERTSON.

- Witnesses:

RUSSEL B. SMART, JOHN T. MAconEGoR.

